<?php
/**
 * PHP版DES加解密类
 * 可与java的DES(DESede/CBC/PKCS5Padding)加密方式兼容
 *
 */
class CryptDes {
    var $key;
    var $iv;
    function CryptDes($key, $iv){
        $this->key = $key;
        $this->iv = $iv;
    }
    function encrypt($input){
        $size = mcrypt_get_block_size(MCRYPT_3DES,MCRYPT_MODE_ECB); //3DES加密将MCRYPT_3DES改为MCRYPT_3DES
        $input = $this->pkcs5_pad($input, $size); //如果采用PaddingPKCS7，请更换成PaddingPKCS7方法。
        $key = str_pad($this->key,24,'0'); //3DES加密将8改为24
        $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_ECB, '');
        if( $this->iv == '' )
        {
            $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        }
        else
        {
            $iv = $this->iv;
        }
        @mcrypt_generic_init($td, $key, $iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
//        echo '<br>des content '.$input;

//        $data = base64_encode($data);//如需转换二进制可改成 bin2hex 转换
//        echo '<br><br> base64Result '.$data;
        $data = bin2hex($data);
//        echo '<br><br> hexResult '.$data;
        return $data;
    }
    function decrypt($encrypted){
//        $encrypted = base64_decode($encrypted); //如需转换二进制可改成 bin2hex 转换
        $encrypted = hex2bin($encrypted);
        $key = str_pad($this->key,24,'0'); //3DES加密将8改为24
        $td = mcrypt_module_open(MCRYPT_3DES,'',MCRYPT_MODE_ECB,'');//3DES加密将MCRYPT_3DES改为MCRYPT_3DES
        if( $this->iv == '' )
        {
            $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
        }
        else
        {
            $iv = $this->iv;
        }
        $ks = mcrypt_enc_get_key_size($td);
        @mcrypt_generic_init($td, $key, $iv);
        $decrypted = mdecrypt_generic($td, $encrypted);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $y=$this->pkcs5_unpad($decrypted);
        return $y;
    }
    function pkcs5_pad ($text, $blocksize) {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }
    function pkcs5_unpad($text){
        $pad = ord($text{strlen($text)-1});
        if ($pad > strlen($text)) {
            return false;
        }
        if (strspn($text, chr($pad), strlen($text) - $pad) != $pad){
            return false;
        }
        return substr($text, 0, -1 * $pad);
    }
    function PaddingPKCS7($data) {
        $block_size = mcrypt_get_block_size(MCRYPT_3DES, MCRYPT_MODE_ECB);//3DES加密将MCRYPT_3DES改为MCRYPT_3DES
        $padding_char = $block_size - (strlen($data) % $block_size);
        $data .= str_repeat(chr($padding_char),$padding_char);
        return $data;
    }
}
//$des = new CryptDes("TF48Y26M394X1MSYHXM4ZVXEQBKTAGQ8", '');//（秘钥向量，混淆向量）
//$ret = $des->encrypt("1111");//加密字符串
//echo '<br> result '.$ret.'<br>';
//$str = $des->decrypt($ret);
//echo '<br> string '.$str.'<br>';
?>